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Clinical Trial for Batch Consistency of EV71 Vaccine

NCT07026500 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 720

Last updated 2025-06-18

No results posted yet for this study

Summary

This trial is designed as a single-center, randomized, double-blind study. A total of 720 infants aged 6 to 35 months are selected (with 240 subjects in each age group: 6-11 months, 12-23 months, and 24-35 months). Subjects from different age groups are randomly allocated to three batch groups in a 1:1:1 ratio, and receive two doses of the EV71 vaccine from the commercial production batch on days 0 and 30. After each vaccination dose, subjects will be observed for immediate reactions for 30 minutes and for solicited adverse events for the next 7 days, as well as for unsolicited adverse events over the 30 days following vaccination. All subjects will have blood samples collected on day 0 (pre-immunization) and day 60 for serum antibody testing. Additionally, 270 subjects will be selected, for additional blood sampling at various time points: 7 days, 14 days, and 30 days after the first dose, and 7 days and 14 days after the second dose, to assess the EV71 antibody levels at different timepoints following various doses of vaccination.

Conditions

  • EV71 Vaccine

Interventions

BIOLOGICAL

EV71 Vaccine

EV71 vaccine of commercial production batch

Sponsors & Collaborators

  • Sinovac Biotech Co., Ltd

    lead INDUSTRY

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
6 Months
Max Age
35 Months
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-09-19
Primary Completion
2020-04-30
Completion
2020-05-31

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07026500 on ClinicalTrials.gov